Thread protector



June 26, 1928. 1,675,143

P. J. SHRUM THREAD PROTECTOR Orig inal Filed April 22, 1924 PwjITJI ZNZOR.

" /2 ATTORNEYS.

Patented June 26, 1928.

UNITED STATES PETER J. SHRUM, F MONACA, PENNSYLVANIA, ASSIGNOR-TO COLONA MANUFACTUR- ING- COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYL- VANIA.

THREAD PROTECTOR.

originalapplication filed April 22, 1924, Serial No. 708,204. Divided and this application filed August 15, 1927. Serial No. 212,981.

My present invention relates to lnternal thread protectors and is a division of an application filed by me on April 22nd, 192i and serially numbered 70820 5 It is customary in shipping internally threaded pipe, since the most vulnerable portions thereof are the ends, to protect these from injury by screwing a thread protector into each pipe end. The protector not only stifi'ens the pipe ends but also protects the internal threads from damage and dirt.

' One object of-this invention is to provide an improved thread protector for use w th internally threaded pipe and couplings whlch is so constructed as to offer special protection to the extreme end portions of the couplings or pipe upon which they are used.

In the drawings, the single view illustrates in section a protector embodying this invention applied to a pipe end having internal tapered threads.

In the construction shown, 2 represents the end portion of a pipe having tapered threads 3 cut therein. The protector is formed from a section of tubing in such manner as to provide a body portion 4 which is tapered and provided with screw threads 5 adapted to mesh with the threads 3 of the pipe end.

The large end of the protector terminates in a double walled annular flange made up of an outwardly extending flange portion 6, an inwardl extending annular lip 7 which is spaced rom the flange and overlies the same and a curved wall 8 which connects the flan e and lip.

T e small end of the body 4 terminates in an un-threaded skirt portion 9 which is of less external diameter than the external diameter of'the smallest part of the threaded 40 body and of less external diameter than the internal diameter of the un-threaded por tion of the pipe.

The annular wall 6 which is curved outwardly projectsbeyond the outer surface of the pipe and thus forms most effective protectlon for the extreme end of the pipe to which theprotector is applied. As shown in the drawings the skirt 9 covers .a portion of the perfect threads as well as the vanishing threads of the pipe and aids in placing the device in protecting position.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A, 'one'piece thread protector comprising an inwardly projecting annular lip spaced.

from said flange and overlying the same and connected thereto by a curved wall, screw threads formed in the outer surface of the bodyand an unthreaded extension for the small end of the body of less external diameter than'the diameter of the smallest threaded portion of the body, said protector being formed from a section of tubing.

3. In a thread protector, a tapered body open a both ends, an outwardly projecting annular flange at the large end of the body, an inwardly projecting annular lip spaced from said flange, overlying the same and connected thereto by a curved wall, screw threads formed in the outer surface of the body and an unthreaded extension for the small end of the body of less external diameter than the diameter of the smallest threaded portion of the body, said curved wall being adapted to project beyond the outer surface of the article to be protected.

4. A thread protector comprising a tapered body portion open at both ends and having an outwardly extending doublewalled annular flange at one end and unthreaded skirt at the other end, said skirt being of less diameter than the internal diameter of the threaded portion of the article to be protected.

In testimony whereof, I have hereunto subscribed my name this 12th day of August, 1927.

PETER J. sHRUM. 

